All Calculator Tools
Browse our complete directory of free online calculators. Choose from 128+ calculation tools organized by category to help you solve any problem quickly and accurately.
Mathematics
9 calculators available
Basic Calculator
Simple arithmetic operations and calculations
Scientific Calculator
Advanced mathematical functions and operations
Triangle Calculator
Calculate triangle area, perimeter, sides, and angles
Fraction Calculator
Add, subtract, multiply, and divide fractions
Algebra Calculator
Solve algebraic equations and expressions
Geometry Calculator
Calculate area, volume, and geometric properties
Statistics Calculator
Statistical analysis and probability calculations
Matrix Calculator
Matrix operations and linear algebra
Graphing Calculator
Plot functions and analyze graphs
Finance
37 calculators available
Mortgage Calculator
Calculate monthly mortgage payments and amortization
Loan Calculator
Calculate loan payments and interest for any loan
Investment Calculator
Calculate compound interest and investment growth
401k Calculator
Plan 401k retirement savings with employer matching
IRA Calculator
Compare Traditional vs Roth IRA growth and benefits
ROI Calculator
Calculate return on investment with multiple scenarios
Tax Calculator
Estimate federal and state income taxes
Compound Interest Calculator
Calculate compound interest growth over time
Retirement Calculator
Plan for retirement with savings goals
Budget Calculator
Create and track personal budgets
Debt Payoff Calculator
Calculate debt payoff strategies
Credit Card Calculator
Calculate credit card payments and payoff time
Savings Calculator
Calculate savings growth and goal timelines
Auto Loan Calculator
Calculate car loan payments and costs
Refinance Calculator
Compare refinancing options and savings
FHA Loan Calculator
Calculate FHA loan payments with MIP
Real Estate Calculator
Analyze rental property investments
Closing Cost Calculator
Estimate home buying closing costs
Property Tax Calculator
Calculate annual property taxes
Capital Gains Calculator
Calculate capital gains tax on investments
Student Loan Calculator
Calculate student loan payments and options
Loan Amortization Calculator
Generate detailed amortization schedules
Payment Calculator
Calculate loan payments for any amount
Debt Consolidation Calculator
Compare debt consolidation savings
APR Calculator
Calculate Annual Percentage Rate with fees
Tax Withholding Calculator
Calculate federal and state tax withholding from paycheck
Self Employment Tax Calculator
Calculate self-employment tax for freelancers and contractors
Social Security Calculator
Estimate Social Security retirement benefits and payouts
Hourly to Annual Salary Calculator
Convert hourly wage to annual salary with overtime
Home Affordability Calculator
Calculate how much house you can afford based on income
Paycheck Calculator
Calculate take-home pay with tax withholding
Inflation Calculator
Calculate purchasing power changes over time
Net Worth Calculator
Calculate total net worth from assets and liabilities
Down Payment Calculator
Calculate down payment and PMI for home purchase
Interest Rate Calculator
Calculate simple and compound interest for investments
Sales Tax Calculator
Calculate sales tax and total cost with discounts
Fuel Cost Calculator
Calculate fuel expenses for trips and commutes
Health & Fitness
22 calculators available
BMI Calculator
Calculate Body Mass Index and health status
Calorie Calculator
Calculate daily calorie needs for weight goals
BMR Calculator
Calculate Basal Metabolic Rate
Body Fat Calculator
Estimate body fat percentage
Ideal Weight Calculator
Calculate your ideal weight range
Water Intake Calculator
Calculate daily water intake needs
Heart Rate Calculator
Calculate target heart rate zones
Blood Pressure Calculator
Analyze blood pressure readings
Sleep Calculator
Calculate optimal sleep and wake times
Macro Calculator
Calculate macronutrient requirements
Pace Calculator
Calculate running pace and finish times
Pregnancy Calculator
Calculate pregnancy due date and milestones
Due Date Calculator
Calculate pregnancy due date
Conception Calculator
Calculate conception date
Ovulation Calculator
Calculate fertile days and ovulation
Pregnancy Weight Gain Calculator
Track healthy pregnancy weight gain
Baby Growth Calculator
Track baby growth percentiles
TDEE Calculator
Calculate Total Daily Energy Expenditure
Lean Body Mass Calculator
Calculate lean body mass and body fat percentage
Protein Calculator
Calculate daily protein needs for your goals
Body Frame Calculator
Determine body frame size for ideal weight
Max Heart Rate Calculator
Calculate maximum heart rate and training zones
Unit Conversions
9 calculators available
Length Converter
Convert between meters, feet, inches, and more
Weight Converter
Convert between kilograms, pounds, ounces, and more
Temperature Converter
Convert Celsius, Fahrenheit, and Kelvin
Volume Converter
Convert liters, gallons, cups, and more
Area Converter
Convert square meters, acres, square feet, and more
Speed Converter
Convert mph, kph, m/s, and more
Pressure Converter
Convert PSI, bar, atm, and more
Energy Converter
Convert joules, calories, BTU, and more
Power Converter
Convert watts, horsepower, and more
Construction
12 calculators available
Concrete Calculator
Calculate concrete volume and materials needed
Paint Calculator
Calculate paint coverage and gallons needed
Sand Calculator
Calculate sand volume, weight, and bags needed
Brick Calculator
Calculate bricks and mortar for wall construction
Gravel Calculator
Calculate gravel for driveways and landscaping
Tile Calculator
Calculate tiles needed for flooring projects
Flooring Calculator
Calculate flooring materials and costs
Roofing Calculator
Calculate roofing materials and costs
Drywall Calculator
Calculate drywall sheets and materials
Lumber Calculator
Calculate lumber needs for construction
Fence Calculator
Calculate fencing materials and costs
Insulation Calculator
Calculate insulation materials needed
Cooking
12 calculators available
Recipe Converter
Scale recipes up or down for different serving sizes
Turkey Cooking Calculator
Calculate perfect turkey roasting times and temperatures
Coffee Ratio Calculator
Calculate perfect coffee to water ratios for brewing
Unit Converter
Convert between cooking measurements
Meat Thawing Calculator
Calculate safe meat thawing times for different methods
Dough Calculator
Calculate pizza and bread dough recipes with baker's percentages
Serving Size Calculator
Calculate serving sizes for recipes
Ingredient Substitution
Find substitutes for common cooking ingredients
Canning Calculator
Calculate safe canning processing times and pressure
Cooking Time Calculator
Calculate cooking times for different foods
Nutrition Calculator
Calculate nutrition facts for recipes
Baking Converter
Convert baking measurements and ingredients
Date & Time
7 calculators available
Age Calculator
Calculate exact age in years, months, and days
Date Difference Calculator
Calculate difference between two dates
Business Days Calculator
Calculate business days between dates
Duration Calculator
Calculate time duration between events
Date Addition Calculator
Add days, months, or years to a date
Week Number Calculator
Find week number for any date
Leap Year Calculator
Check if a year is a leap year
Education
6 calculators available
Grade Calculator
Calculate final grades and GPA
GPA Calculator
Calculate Grade Point Average
Test Score Calculator
Calculate test scores and percentages
Study Time Calculator
Plan study schedules and time allocation
Class Rank Calculator
Calculate class ranking and percentile
Attendance Calculator
Track and calculate attendance percentage
Other Tools
14 calculators available
Tip Calculator
Calculate tips and split bills
Discount Calculator
Calculate discounts and sale prices
Password Generator
Generate secure passwords
QR Code Generator
Generate QR codes for text and URLs
Color Code Converter
Convert between color formats (HEX, RGB, HSL)
Base64 Converter
Encode and decode Base64 text
Hash Generator
Generate MD5, SHA-1, and SHA-256 hashes
Random Number Generator
Generate random numbers with custom ranges
Hex Calculator
Convert between hexadecimal, decimal, binary, and octal
Bandwidth Calculator
Calculate network bandwidth and data transfer times
Age Calculator
Calculate exact age in years, months, and days
Roman Numeral Converter
Convert between Roman numerals and Arabic numbers
Text Counter
Count words, characters, sentences, and paragraphs
Gas Mileage Calculator
Calculate vehicle fuel efficiency in MPG or KPL